Devices, systems and methods for gravity-enhanced microfluidic collection, handling and transferring of fluids

Abstract

The disclosed apparatus, systems and methods relate to the collection of bodily fluids through the use of gravity and microfluidic properties by way of a collector. The collector can make use of microfluidic networks connected to collection sites on the skin of a subject to gather and shuttle blood into a reservoir by a combination of capillary action and gravitational forces. The collected fluid is moved through the microfluidic networks and into the reservoir by a variety of approaches.

Description

CROSS-REFERENCE TO RELATED APPLICATION(S)[0001]This application claims priority to U.S. Provisional Application No. 62 / 032,266 filed Aug. 1, 2014 and entitled “Gravity-Enhanced Microfluidic Devices and Methods for Handling and Transferring Fluids,” and U.S. Provisional Application No. 62 / 101,784 filed Jan. 9, 2015 and entitled “Devices, Systems & Methods for Gravity-Enhanced Microfluidic Collection, Handling And Transferring Of Fluids,” which are hereby incorporated by reference in their entirety under 35 U.S.C. § 119(e).FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT[0002]This invention was made with government support under Contract # W31P4Q14C0006 awarded by DARPA. The government has certain rights in the invention.TECHNICAL FIELD[0003]The disclosed technology relates generally to the collection of bodily fluids, and in particular, to the devices, methods, and design principles allowing the collection of bodily fluids into a receptacle and, in certain embodiments, the process of acti...

AI Technical Summary

Benefits of technology

[0024]In Example 18, the system of claim 16 further comprising a ramp. In certain Examples, this ramp may comprise an open microfluidic channel with at least one wetted surface defining a wetted perimeter length, wherein the wetted surface contacts a fluid flowing through the channel at a contact angle, and at least one free surface comprising an open air-liquid interface defining a free perimeter length, wherein the ratio of the free perimeter length to the wetted perimeter length is less than the cosine of the contact angle, thereby enabling spontaneous capillary flow.

Problems solved by technology

In order to transfer the bodily fluid to a container, receptacle, or an analysis device, multiple steps are required that are time consuming and / or cumbersome.

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